Pendent electric switch.



G. B. THOMAS. PENDENT ELECTRIC SWITCH.

APPLIOATION FILED MAR, 23, 1906.

926,622; Patented June 29, 1909.

WITNESSES': NVENTOR /M-f. 4%. i @L mw fj y j y BY n i Mmm ATTORNEYS ,DL

UNITED STATES PATENT CEEICE.

GEORGE B. THONIAS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO PERKINS ELECTRIC SWITCH MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PENnENT ELECTRIC SWITCH.

Patented June 29, 1909.

Application med larch 23,1906. Serial No. 307,665.

To all whom it may concern.'

Be it known that I, GEORGE B. THOMAS, a citizen of the United States of America, residing in Bridgeport, county of Fairfield, and St-ate of Connecticut, have invented certain new and useful Im rovements in Pendent Electric Switches, o which the following is a specification.

It is the obect of my' invention to construct a simp e, inexpensive and efficient pendent electric switch.

In thel accompanying drawings Fi ure 1 represents a plan view, drawn to an en arged scale, o f the switch with the shell removed; Fig. 2 is a central vertical section of the casing on the line 2--2, Fig. 1; Fig. 3 is a section on the line 3,3, Fig. 1; and Fig. 4 is a side view of the complete switch.

Referring to these drawings, 11 is a cupshapedv body or casing of porcelain or other insulating material, of a smgle piece. This insulating body completely incloses the switch ofperating mechanism, being open at'l the top or the insertion of the switch mechanism and closed at the bottom, except where holes 30 are provided for the free passage of the two push buttons 12 and 13 and for securing screws, as will be hereinafter described. l

On the top surface of the insulating body, are secured terminal plates 15, by means of the screws 19V and 20 passing longitudinally through the casing.l These plates carry binding osts 16 for the incoming wires and are in elgctrical connection with the spring contact plates 17 and 18. The Contact plates 17 and 18 project down into the interior of the porcelain body to coperate with .the contact lever 22 of the switch mechanism.

The switch operating mechanism roper, com rising a rock shaft 21 and the ma e and brea Contact lever 22, and other necessary parts niay be substantially such a snap switch as is shown in my prior patent No. 743,348, November 3, 1903. This mechanism is carried on a sup orting plate 23, mounted on one side of t e interiori of the casin and held by suitable horizontal screws 24 ig. 2),i passin through one side ofthe insulating body. ver the top of the casing' is placed a -plate or sheet` of insulation 28 (Flg. 3) betweenl the screwsof the binding posts and the switch to prevent the loose ends ofthe terminal wires from making a short circuit.

The operation of the mechanism is substantially the same as that of my above mentioned patent. By pressing the lower of the two push buttons, the rock shaft 21 tensions the spring until the catch is released, when the Contact 22 swings over, either making or breaking the circuit through the spring clips 17 and 18. In the drawing the switch level` is shown as thrown over to the open position.

The parts described are inclosed by a metallic casing 10, Fig. 4, the'wires coming in through the usual errule 14.

'I claim as my invention- 1. A push button pendent switch, comprising an outer casing and an insulating cup-shaped body open at the top for the insertion of the switch mechanism, in combination with binding posts and spring clips at the to'p thereof, switch mechanism inclosed in the body and a sheet of insulation separating the binding posts from the switch mechanism.

2. A' push button pendent switch, -comprising a one-piece cup-shaped porcelain ody open at the top for the insertion of the switch mechanism, in combination with switch mechanism wholly contained within the insulating body, a supporting plate for the switch mechanism, securing screws for the said plate passing through the side wall of the insulating. body, and the two push buttons passing through holes in the bottom of said body.

3. A two-button pendent `switch comprising a body of insulation having'a longi' GEORGES. THOMAS.

Witnesses H. W. GOLDISBOROUGH, C. W. GCCDRIDCE. 

